# Light Route: One Line Puzzle — Fill every cell in one stroke

> Fill every cell in one stroke (iPhone/iPad app by Cheng Yu Chiang.)

- Source: https://appshunter.io/ios/app/light-route-one-line-puzzle/id6801398900 (this page in markdown: same URL + `.md`)
- Developer: [Cheng Yu Chiang](https://appshunter.io/developer/1888129765)
- Category: Games, Casual, Puzzle
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 6 MB
- Languages: American English, Chinese (Traditional, Taiwan)
- Released: 2026-08-30
- Data updated: 2026-09-04
- User reviews in markdown: https://appshunter.io/ios/app/light-route-one-line-puzzle/id6801398900/reviews.md

## What is Light Route?

Light Route is a one-line path puzzle that grows with you. Start from the glowing node, pass each numbered checkpoint in order, fill every open cell, and reach the exit.

• 300 progressively generated levels from 4×4 to 8×8
• Blocked cells and ordered checkpoints steadily raise the challenge
• Trace backward along your route whenever you take a wrong turn
• Early puzzles allow multiple routes; the final 20 have a verified unique solution
• Use hints when stuck, with optional rewarded ads for more hints
• Free players may see one interstitial only after every five completed levels
• A one-time purchase permanently removes interstitial ads

No account is required. Progress and settings are stored on your device.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Remove Interstitial Ads | $1.99 | one-time |



## Version history (last 1 release)

### 1.0.0 — 2026-08-30

No release notes.

## More apps by Cheng Yu Chiang

- [Lumee: Cute Widgets for You](https://appshunter.io/ios/app/lumee-cute-widgets-for-you/id6761321482)
- [Swipee: Slim Your Album](https://appshunter.io/ios/app/swipee-slim-your-album/id6762026068)
- [兒童益智：數字配對](https://appshunter.io/ios/app/id6799059012)
- [兒童益智：雙語拼圖](https://appshunter.io/ios/app/id6799680460)
- [兒童益智：翻牌配對](https://appshunter.io/ios/app/id6799819973)
- [Number Match: Make 10](https://appshunter.io/ios/app/number-match-make-10/id6800591825)

All apps by Cheng Yu Chiang: https://appshunter.io/developer/1888129765

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*